Automatic magnetic circuit-breaker.



Patented .IuIy I5, |902.

2 Sheets-Sheet I.

W. M. SCOTT.

AUTOMATIC MAGNETIC CIRCUIT BREAKEB.

(Application filed June 20, 1902.)

(No Mndel.)

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N0. 704,974. Patented lilly l5, |902.

' W. M. SCOTT.

AUTOMATIC MAGNETIC CIRCUIT B REAKER.

(Application filed Tuna 20, 1902.)

2 Sheets-Sheet 2.

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ATTURNEY. l

UNITED STATES PATENT OFFICE.

WILLIAM M. SCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CUT- TER ELECTRICAL rb MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

AUTOMATIC MAGNETIC CIRCUIT-BREAKER.

SPECFICATION forming part of Letters Patent No. 704,974, dated July 1 5, 1902.

Original application led Pehruary 23,1900, Serial No. 6,179. Divided and this application tiled June 20,1902. Serial (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM M. Seo'rr, a citizen of the United States,residing at Philadelphia,'coun'ty of Philadelphia, and State of 5 Pennsylvania, have invented a new and useful Automatic Magnetic Circuit-Breaker, of which the following is a specification.

My invention relates to automatic magnetic eircuit-breakers; and my object is to afford ro improved means for making and breaking a circuit havin g large current-carryin g capacity and providing improved means for increasing the efliciency of the engagement of the oontacts and the facility of their manual operation. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my device, showing the switches closed. Eig. 2 is a front 2o elevation of the same. Fig. 3 is a side elevation of my device, showing the switches open.

Eig. f1 is a detailed view of the latch member.

Similar numerals refer to similar parts throughout the several views.

Referring to the drawings, 1 indicates the laminated bridge, which is pivoted to the framework of the device at 2 and is adapted to bridge the fixed terminals 7 and 8. The member or extension 3 is rigidly connected with the bridge 1 and extends beyond the pivot 2. This extension 8 is pivotally con nected at its extreme end by the link or connecting member 4. with the manually-operative actuating-lever 5, which in turn is pivoted to the framework of the device at 0.

It will be noted that the upward movement of the projecting member 3 in response to spring 9 will cause the consequent rotation of the switch-bridge 1 and the separation of its respective ends from their stationary contacts 7 and 8, as shown in Fig. 8, and the reverse movement of the switch-bridge 1 to cause its engagement with the stationary contacts 7 and 8 is produced by the downward movement of the manually-operative lever 5, communicated through link 4 to the extension 3 of the bridge member 1 against said tension of spring 9, and the said bridge member 1 is normally held in contact with its station ary contacts by the latch 10, which engages with a roller 11, secured to the manually-operative member 5. This latch 10 is pivoted at 12 to the framework of the device and has an extension projecting beyond said pivot 12, the extreme end of which is adapted to rest upon the pin 13.

Connected in series with the stationary contacts 7 and 8 is a solenoid-coil 14., which surrounds the movable core 15, which normally rests upon the adjusting screw 1G and is adapted to be actuated upon abnormal current in the coil to impinge upon the pin 13 to actuate the latch 10 to release the manuallyoperative lever 5. Projecting beyond the pivot 6 is an extension of the manually-oper ative member 5, which extension carries the roller 26, which is adaptedy to occupy and move in the slot 17 in the arm 18, which is pivoted at 19 to the framework of the device. This arm 18 carries at its free end a bridge 20, adapted to cooperate with the fixed terminals 21, in shunt with the contacts 7 and 8 of the main switch. The shape and location of the slot 17 is such as to secure the actuation of the lever 18 by the hand-lever 5 to close the supplemental shunt-switch prior to the closing of the main switch and to open the supplemental switch subsequent to the opening of the main switch.

It is apparent that the manual member 5, with its projection, in which is pivoted the roller 11, in conjunction with the link 4, forms a toggle which amounts to a power-multiplying device, by means of which the member 3 is acted upon by a great force at about the time the bridging member 1 is coming into contact with the main terminal blocks 7 and 8. Further depression of the member 5 causes the pivot 1l to approach more nearly a line to be imagined between the pivot 6 and the lower pivot of link e, which is the position of maximum advantage. In consequence of this arrangement the laminte of the bridge 1 spring slightly after coming into contact with the blocks 7 and 8 and in so doing make a slight wiping action on said contacts, securing the very best electrical contact.

The bridge member 1, it is to be noticed,

rotates in a vertical plane-that is, in a plane parallel to a plane embracing the two main contact-blocks 7 and 8.

This application is a division ot my prior application, Serial No. (5,179, filed February 23, 1900.

l. The combination with a base, of a main terminal, a second main terminal vertically above said terminal, a laminated bridge member pivotally secured to the base and rotatably movable to and away from the main terminals in a plane parallel to a plane including said fixed terminals, and an actuating member having power-multiplying connection between the base and the laminated member.

2. The combination of a base, main fixed terminals in a vertical plane located thereon, a laminated bridge pivotally secured to said base, and having' a rotatable movement to and away from the fixed terminals in a plane parallel to a plane including' said xed terminals, and an actuating member pivotally secured to the base and a power-multiplying connection with the laminated bridge.

3. In an electric switch, the combination of a base, main fixed terminals located thereon, one vertically above the other, and a laminated member pivotally secured to the base and rotatably movable in a plane parallel to a plane embracing or passing through the fixed terminals, to and away from said fixed terminals, and anactuating member having power-multiplying connection with the laminating member.

.4. In an electric switch, a base, main fixed terminals located thereon, one vertically above the other, a laminated member pivotally secured to the base and having rotatable movement in a plane parallel to a plane embracing or passing through the fixed terminals to and away from the fixed terminals, andan actuating member pivotally secured to the base and a power-multiplying connection with the laminated member.

5. In an electric switch, the combination of a base, main fixed terminals located thereon, one vertically above the other, a movable laminated bridge cooperating with said terminals and pivotally secured to said base, a manuallyoperative actuating member, a toggle connection between said member and the bridge, spring means for actuating the bridge, latching means for normally restraining the switch in closed position and automatic magnetic means for actuating the restraining means.

6. ln an electric switch, the combination of a base, main fixed terminals located thereon, one vertically above the other, the engaging face of one terminal being in a vertical plane, and the engaging' face of the other terminal in a horizontal plane7 a laminated bridging member pivoted to the base, an actuating member and toggle-lever connection between said actuating member and the bridging member.

7. ln an electric switch, the combination of main fixed terminals, one vertically above the ifea,

other, the engaging face of one 'terminal being in a vertical plane and the engaging face of' the other terminal being in a horizontal plane, and a bridging member for said terminals.

S. In an electric switch, the combination of main fixed terminals, one terminal having its engaging face in a vertical plane, and the other terminal having its engaging face in a horizontal plane, and a bridging member for said terminals.

9. ln an electric switch, the combination of main fixed terminals, one terminal having its engaging face in a vertical plane and the other terminal having its engaging face in a horizontal plane, a bridging member for said terminals,and supplemental contacts in shunt to said fixed terminals.

l0. ln an electric switch, the combination of main terminals,one vertically above the other, a laminated member for bridging said terminals pivoted to the base, an actuating member connected to said bridging member by means ot toggle-levers a latch engaging with one of said toggle-levers, and electroresponsive means for operating the latch.

ll. ln an electric switch, the combination of main contact-blocks, one vertically above the other, a laminated member for bridging said blocks pivoted to the base, an actuating member connected to said bridging member by means of toggle-levers, a latch engaging with one of said toggle-levers, an electroresponsive means for operating the latch and shunt-contacts vertically above the main contacts also released by said electroresponsive means.

12. An electric switch comprising stationary contact-blocks in vertical alinement, a supporting-base therefor, a laminated member engaging with its beveled ends upon said blocks, a supporting-arm pivoted to said base and attached to the laminated member at substantially its middle, and an actuatinglever pivoted to the base and having oper-- ative connection with said supporting-arm.

13. In an automatic magnetic circuitbreaker, in combination with a base, stationary main terminals mounted thereon in vertical alinement and shunt-terminals mounted on said base above the main terminals, alaminated contact member pivoted to said base and movable in a vertical plane to and away from said main terminals, a movable shunt contact member, a toggle for operating the main contact member, means for locking the circuit-breaker in closed position, and a tripping device controlled by electroresponsive means.

let. ln an automatic magnetic circuitbreaker, in combination with a base of stationary main terminals thereon in vertical alinement, and shunt-terminals mounted on said base above the main terminals, a laminated contact member pivoted to said base and movable in a vertical plane to and away from i said main terminals, a movable shunt contact member, a toggle for operating the main con- IOL) IIO

IZO

tact member, means for operating the toggle and shunt contact member, means for locking the breaker in closed position, and a tripping device controlled by electroresponsive means.

15. In an electric switch, the combination of fixed terminals and a movable laminated bridge pivotally secured to the base on an axis parallel with the base, the bridge laminzc having beveled ends engaging with said fixed terminals, and a manually-operative actuating-lever having a power-multiplying connection with the bridge.

1G. In an electric switch, the combination of fixed terminals and a laminated bridge pivotally secured to the base on an axis parallel with the base and rotatably movable in a plane parallel to a plane including said fixed terminals to and away from said fixed terminals, and an actuating member having powermultiplying connection between the base and the laminated member.

17. In an electric switch, the combination of fixed terminals, a laminated bridge pivotally secured to the base on an axis parallel with the base and having a rotatable movement to and away from the fixed terminals in aplane parallel to a plane including said fixed terminals, and an actuating member pivotally secured to the base having power-multiplying connection with the laminated bridge.

1S. In an electric switch, a combination of fixed terminals, a movable laminated bridge pivotally secured to the base on an axis parallel with the base, the bridge laminze having beveled ends engaging with said fixed terminals, and a manuallyoperative actuating member having toggle-lever connection with the bridge.

19. In an automatic magnetic circuitbreaker, the combination of fixed terminals, and a movable laminated contact member pivotally secured to the base on an axis parallel with the base, the lamina beveled at their ends and engaging with the fixed terminals, and a manually-operative actuatinglever having power-multiplying connection with the laminated member.

20. In an automatic magnetic circuitbreaker the combination of fixed terminals and a laminated member pivotally secured to the base on an axis parallel with the base and rotatably movable in a plane parallel to a plane embracing or passing through said fixed terminals to and away from said fixed terminals, andan actuating member having powermultiplying connection between the base and the laminated member.

2l. In an automatic magnetic circuitbreaker, the combination of fixed terminals, a laminated member pivotally secured to the base on an axis parallel with the base, having rotatable movement in a plane parallel to a plane embracing or passing through the fixed terminals to and away from the fixed terminals, and an actuating member pivotally secured to the base and having power-multiplying connection with the laminating member.

22. In an electric switch, the combination of fixed terminals, a movable laminated bridge cooperating therewith and pivotally secured to the base on an axis parallel with the base, a manually-operative actuating member having toggle connection with the bridge, spring means for actuating the movable bridge, latching means for normally restraining said actuation and automatic magnetic means for actuating the restraining means.

23. In an electric switch, a base, contactblocks'mounted thereon, one vertically above the other, a bracket on said base, a laminated bridging member pivoted in said bracket on an axis parallel with the base, and rotatable in a plane at right angles to the plane of the base to and away from the main contactblocks, and a power-multiplying connection with said bridging member.

IVM. M. SCOTT.

i/Vitnesses:

H. C. OAMPION, J r., T. W. GREATHEAD. 

